An Electric Beam Trawl for the Capture of Larval Lampreys

McLain, Alberton L.; Dahl, Frederick H.

doi:10.1577/1548-8659(1968)97[289:aebtft]2.0.co;2

Cited by 6 publications

(4 citation statements)

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“…While electrofishing in shallow water relies on capture of ammocoetes in dip nets or seines, electrofishing in deep water is often coupled with either a suction pump or trawl to bring immobilized larvae to the surface (McLain and Dahl 1968;Bergstedt and Genovese 1994;Fodale et al 2003). Bergstedt and Genovese (1994) tested the capture efficiency of a deepwater electrofisher in water depths of 1-2 m. Power for this device was supplied by a standard backpack electrofisher.…”

Section: Juvenilesmentioning

confidence: 99%

Capture and collection of lampreys: the state of the science

Moser

Butzerin

Dey

2007

Rev Fish Biol Fisheries

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The need for native lamprey conservation, improved lamprey fishery management, and better assessment of non-indigenous lamprey control measures has resulted in increased effort to survey lamprey populations and assess their status. Depending on the study objectives and target species/life stage, collection methods vary dramatically. We therefore provide a comprehensive review of sampling considerations and techniques used to capture, collect, handle, and enumerate both juvenile and adult lamprey life stages. Surveys for lamprey are often constrained by the lack of basic biological information, such as reliable characters for field identification of larvae (ammocoetes), migratory timing of anadromous forms, and spawning/nest building behavior of adults. However, there are a number of studies that have documented habitat preferences of the relatively sedentary ammocoetes. Consequently, existing sampling protocols have focused on the development of stratified sampling that targets optimal ammocoete habitat. In addition to this approach, we discuss methods and gear that can be used to survey migratory life stages, lamprey nests, and difficult-to-sample, deepwater ammocoete habitats.

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Section: Juvenilesmentioning

confidence: 99%

Capture and collection of lampreys: the state of the science

Moser

Butzerin

Dey

2007

Rev Fish Biol Fisheries

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“…Benthic trawls have been modified with anodecathode electrical arrays for sampling deep lakes (Peterson 1996). McLain and Dahl's (1968) sled-based trawl was effective in capturing a variety of benthic fishes as well as the targeted sea lamprey ammocoetes. Such a sled, however, may prove unwieldy and difficult to bring into the boat on repeated trawls.…”

Section: Resultsmentioning

confidence: 99%

“…While electrofishing gear (including electrified seines) has been successfully used in wadeable streams (Bayley et al 1989;Peterson and Rabeni 2001), its utility has been limited by not being able to sample fish from deeper water (depths greater than 1.2 m). An exception is the capture of sea lamprey Petromyzon marinus ammocoetes by deepwater electrofishing (McLain and Dahl 1968;Bergstedt and Genovese 1994;Moser et al 2007). While most of these deepwater methods have used a combination of electric currents and suction to capture ammocoetes, McLain and Dahl (1968) modified a sled-mounted benthic trawl by electrifying it and pulling it along the lake bottom.…”

mentioning

confidence: 99%

“…An exception is the capture of sea lamprey Petromyzon marinus ammocoetes by deepwater electrofishing (McLain and Dahl 1968;Bergstedt and Genovese 1994;Moser et al 2007). While most of these deepwater methods have used a combination of electric currents and suction to capture ammocoetes, McLain and Dahl (1968) modified a sled-mounted benthic trawl by electrifying it and pulling it along the lake bottom. Although it was considered to be effective in capturing ammocoetes, it also had a high bycatch rate for 23 species representing 19 genera.…”

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confidence: 99%

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Development and Efficacy of an Electrified Benthic Trawl for Sampling Large‐River Fish Assemblages

Freedman

Stecko

Lorson

et al. 2009

N American J Fish Manag

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Sampling small benthic and lithophilic fish species in large rivers and lakes presents challenges not adequately addressed by conventional survey methods such as boat electrofishing and gill netting. The development of the Missouri trawl has helped to address these issues; however, our observations by scuba diving when using the Missouri trawl have revealed avoidance of the trawl by benthic fishes, especially in rocky substrates. Therefore, we equipped a Missouri trawl with a cathode-anode electrical array to facilitate capture by attracting and immobilizing fish. In 40 paired comparisons with a standard Missouri trawl in the upper Ohio River drainage of Pennsylvania, this electrified PSU trawl captured significantly more fish and species as well as more large fish. The PSU trawl also captured more species and more fish across habitats and rivers within the drainage. The PSU trawl is therefore a useful new device for sampling large-river benthic fish communities.

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